| OFF |
OFF |
OFF |
Normal |
System is operating normally |
None |
| Red ON |
OFF |
H– |
System Failure |
Internal circuit failure or output short-circuit |
Power reset, consider hardware replacement if repeated |
| Red ON |
OFF |
P6 |
System Failure |
24V short-circuit at test/safety output terminal |
Check wiring for shorts, power reset |
| – |
– |
P1 + node |
Test Output Error |
Malfunction or anomaly in test output |
Check test output terminal and connected load |
| – |
– |
P2 + node |
Overload at Test Output |
Test output overloaded |
Remove overload and verify connected devices |
| – |
– |
P3 + node |
Overcurrent at Safety Output |
Overcurrent or short in safety output |
Inspect output circuit and wiring |
| Flashing Red |
Green/Red |
E8 + node |
Switch Setting Mismatch |
DIP or Rotary switch settings mismatch |
Verify switch settings and reset |
| Red ON |
– |
F0 + node |
Duplicate MAC ID |
Duplicate node address on the network |
Change duplicate node address, reboot power |
| Red ON |
– |
F1 + node |
Bus Off |
Excessive communication bus errors, bus off state |
Check cables, termination resistors, and noise |
| – |
– |
E0 + node |
Network PS Voltage Low |
Network power supply voltage dropped |
Inspect power supply condition |
| – |
– |
E2 + node |
Transmission Timeout |
No or delayed communication response |
Check cables and network condition |
| Flashing Red |
– |
L9 + node |
Standard I/O Connection Error |
EtherNet/IP I/O connection error |
Check IP settings, cable, and communication status |
| Flashing Red |
– |
A1 + node |
Safety I/O Stopped |
Safety I/O communication stopped |
Inspect Safety I/O connections and settings |
| Flashing Red |
– |
L9↔n4 |
Tag Data Link Error |
EtherNet/IP tag data link error |
Check communication settings, tag mapping, and cable |
| Red ON |
– |
(None) |
Ethernet Controller Error |
Critical failure in Ethernet controller |
Power reset, consider hardware replacement |
| Flashing Red |
– |
N4 + node |
Safety Tag Data Link Error |
Safety tag data link failure |
Review network settings and check safety device status |
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